Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b2af4b6ead7c42…

MALICIOUS

PDF

82.6 KB Created: 2021-04-15 06:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ee504d5fe1f81692fb1525be8a012462 SHA-1: 1f939e4f7ff089f9e9462e25303ddfb23587fbf8 SHA-256: d0b2af4b6ead7c42d346e4aedeeb71c31a3d330cf68b91633583dfd4e7157a62
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/strik?utm_term=when+did+temple+sacrifices+stop PDF link annotation
    • http://shopwithsale.website/kenmore_model_148_sewing_machine_manualwlu7g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_601b75dc06a7a.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/4484948.pdfIn PDF document text
    • http://rusherx.studio/babitoropadithplpl.pdfIn PDF document text
    • https://midezotadodagof.weebly.com/uploads/1/3/5/3/135326840/mipapemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379482/normal_5fdfa1b1a4ea4.pdfIn PDF document text
    • https://wafukereloxajof.weebly.com/uploads/1/3/5/3/135311523/vinanoxugi-tiwod-nomusokagi-podupawome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_602ab1f6a9957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382619/normal_600626a873114.pdfIn PDF document text
    • http://persequen.com/white_rodgers_1e78-151_resetly2lg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vojusoligobaj.epizy.com/ccna_v3_routing_and_switching_exam_study_notes.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_32c2235bc2cb438fbdeba2538ceba39a.pdf?index=trueIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_1a36e10bc38b489f8a74a99d66c9f561.pdf?index=trueIn PDF document text
    • http://ninijoziwedef.rf.gd/anxiety_and_related_disorders_interview_schedule_for_dsm_5.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_9c4792124bf941508e994b45219ce066.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_becad8aef13b4f678a1363632ecf84b9.pdf?index=trueIn PDF document text
    • https://f72e0e13-a873-49c5-9cb5-3c2848b8c5b2.filesusr.com/ugd/f8ba4b_5eca14b6498e4d45aae3cdad309835b9.pdf?index=trueIn PDF document text
    • http://jafafikano.epizy.com/vatexonetilolezadu.pdfIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_6970d381ba724e06afca169149c7a154.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 5196 bytes
SHA-256: 9507b76efbf605207e9a15cee6c38551822d6a4954e566efe0b50dc88c2f78fe
font_01_sfnt_off00010abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABC 10708 bytes
SHA-256: 8d38e62701b92c1051354f93de3f2c605a97bffb277881eebfa8fdad34ec0e1e
font_02_sfnt_off00012f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f